Need some advice...

[BP-Revo]

Well, good 'ole RCM has never let me down, from asking a girl out to prom, fixing RAID arrays on my computer, and of course all my brushless needs.

So I have yet another bit of advice to ask...

I have a "friend" who I no longer speak to / he no longer speaks to me for whatever reason (he one day just flipped and started treating me like sh!t so I didn't bother calling him anymore and he never called me so whatever). Not a big deal to me since his overall treatment of me wasn't quite up to par despite me treating him very nicely. I treated him to a bunch of stuff - even took him to the Long Beach Grand Prix when I had a spare ticket - they were pit row luxury box seats with catered lunch and a pace car ride too, so they weren't cheap! My dad and I were supposed to go but my dad got sent on a business trip so he said I could take whoever - I regret it now...sorely.

So now the issue is that this tool is a bit obsessed with my girlfriend (for those that remember - same girl I took to prom - been almost 2 years now). He out of the blue will message her on AIM or send her a text message and she'll respond out of courtesy and he'll immediately start trashing on me (making stuff up) in the hopes she'll break up with me or something. She tells me every time this happens and we both laugh at how pathetic it is.

However, I've recently learned that he's kind of been stalking a few other girls. I have to say he's a little obsessive. He liked this one girl and asked her out a bunch of times (way more than the 3 try rule) and even after she made clear she wasn't interested he was still all over her...and still is.

I looked up sociopath and he (very eerily) matches the criteria almost perfectly down to the letter.

So, my question is, should I go have a talk with him and make it clear he's to not talk to my girl at all or should I let him have his random text messages and AIM messages?

Any advice welcome.